<%--
  Created by IntelliJ IDEA.
  User: 83439
  Date: 2017/8/28
  Time: 18:20
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
  String path = request.getContextPath();
  String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>
<html>
<head>
  <base href="<%=basePath%>">
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <link type="text/css" rel="stylesheet" href="<%=basePath%>statics/css/webuploader.css"/>
  <title>文件上传</title>
</head>
<body>
<h2 style="text-align: center">文件上传</h2>
<!--dom结构部分-->
<div id="uploader" class="wu-example">
  <!--用来存放文件信息-->
  <div id="thelist" class="uploader-list"></div>
  <div class="btns">
    <div id="picker">选择文件</div>
    <button id="ctlBtn" class="btn btn-default">开始上传</button>
  </div>
</div>
<script type="text/javascript" src="<%=basePath%>statics/js/jquery-3.2.1.min.js"></script>
<script type="text/javascript" src="<%=basePath%>statics/js/webuploader.min.js"></script>
<script type="text/javascript">
  jQuery(function() {
    var $ = jQuery,
            $list = $('#thelist'),          //选择文件的按钮
            $btn = $('#ctlBtn'),            //开始上传的按钮
            state = 'pending',              //添加一个状态判断的变量
            uploader;

    var uploader = WebUploader.create({

      // swf文件路径
      swf: '<%=basePath%>statics/swf/Uploader.swf',

      // 文件接收服务端。
      server: '<%=basePath%>rest/upload/uploadFile',

      // 选择文件的按钮。可选。
      // 内部根据当前运行是创建，可能是input元素，也可能是flash.
      pick: '#picker',

      // 不压缩image, 默认如果是jpeg，文件上传前会压缩一把再上传！
      resize: false
    });

    // 当有文件被添加进队列的时候
    uploader.on( 'fileQueued', function( file ) {
      $list.append( '<div id="' + file.id + '" class="item">' +
              '<h4 class="info">' + file.name + '</h4>' +
              '<p class="state">等待上传...</p>' +
              '</div>' );
    });

    // 文件上传过程中创建进度条实时显示。
    uploader.on( 'uploadProgress', function( file, percentage ) {
      var $li = $( '#'+file.id ),
              $percent = $li.find('.progress .progress-bar');

      // 避免重复创建
      if ( !$percent.length ) {
        $percent = $('<div class="progress progress-striped active">' +
                '<div class="progress-bar" role="progressbar" style="width: 0%">' +
                '</div>' +
                '</div>').appendTo( $li ).find('.progress-bar');
      }

      $li.find('p.state').text('上传中');

      $percent.css( 'width', percentage * 100 + '%' );
    });

    uploader.on( 'uploadSuccess', function( file ) {
      $( '#'+file.id ).find('p.state').text('已上传');
    });

    uploader.on( 'uploadError', function( file ) {
      $( '#'+file.id ).find('p.state').text('上传出错');
    });

    uploader.on( 'uploadComplete', function( file ) {
      $( '#'+file.id ).find('.progress').fadeOut();
    });

    uploader.on( 'all', function( type ) {
      if ( type === 'startUpload' ) {
        state = 'uploading';
      } else if ( type === 'stopUpload' ) {
        state = 'paused';
      } else if ( type === 'uploadFinished' ) {
        state = 'done';
      }

      if ( state === 'uploading' ) {
        $btn.text('暂停上传');
      } else {
        $btn.text('开始上传');
      }
    });

    ///开始上传
    $btn.on( 'click', function() {
      //判断上传状态
      if ( state === 'uploading' ) {
        uploader.stop();
      } else {
        uploader.upload();
      }
    });
  });
</script>
</body>
</html>
